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  1. M

    Kobelco hydraulic excavators

    Many of you have known me through the Heavy Equipment Forum (HEF) posts, Senior Member status joined back in July of 2008, and my helping you with sorting out problems with either your Kobelco or MDI/Yutani hydraulic excavators. I have launched my own forum (paid membership only) of which one...
  2. M

    Kobelco hydraulic excavators

    hi james, i am not seeing that the old # supercedes to this newer #. please e-mail me directly at " hf_hydraulics@hotmail.com " and i'll look into this tomorrow and send you off some info/stuff. cheers! adam
  3. M

    Kobelco hydraulic excavators

    hi, you will likely find that it is simply either the straight travel switch has been turned on, or the heavy lift switch is turned on, or could even be a bad sensor, etc... cheers adam
  4. M

    kobelco excavator

    hi, there is no solenoid, the boom up primary hyd pump is p1. p2 confluxes in to aid and provide the extra speed. i suggest you install 6,000 psi hyd prs gauges on both main hyd pumps. see which hyd pump is turning on. the remote pilot lines shift boom spool as well as shifts the p2 neutral cut...
  5. M

    Kobelco hydraulic excavators

    hi, - serial number is incomplete - is engine mitsubishi or cummins engine ? - boom raise is supposed to be both pumps on lifting - there is NOT a solenoid to turn second pump (conflux) on or off the hyd circuit uses tees and a times shuttles within the hyd fittings and/or shuttles inside the...
  6. M

    Kobelco hydraulic excavators

    hi, please e-mail me at hf_hydraulics@hotmail.com plus also call me when you're sitting in the cab seat we can diagnose over the phone on your machine. work# 905-888-9070 home# 905-697-9626 cheers adam
  7. M

    Kobelco hydraulic excavators

    hi, $ 1200 seems a fair price. the cab display part number is locked off to my region on that model. i have sold cab displays (which are a computer themselves too - " C3 ") for $ 2000.00 cad + that seems cheap to me. if much for you, try googling people have told me theyre available aftermarket...
  8. M

    Kobelco hydraulic excavators

    hi, note: engine specs lo-idle = 875 rpm ( +/- 25 ) H mode (hi-idle) = 2320 rpm S mode (hi-idle) = 2000 rpm FC mode (hi-idle) = 1600 rpm DECEL = 1050 rpm ( +/- 50 rpm ) pf sol hyd pressure at hi-idle under no load = 3 bar maximum note: on arm in digging if the primary hyd pump (p2) does not...
  9. M

    Kobelco hydraulic excavators

    hi, please e-mail me at " hf_hydraulics@hotmail.com " have your mailing address etc... i'll quote you, but i'd want it at my shop this way i'll be on-hand to oversee the job myself. adam
  10. M

    Kobelco hydraulic excavators

    hi Jason, i believe/think in an earlier post of yours i suggested that it would be best that you give me a call at work. i'm in ontario. my work # 1-905-888-9070 be sure to specifically ask to speak with me. plus please e-mail me at " hf_hydraulics@hotmail.com " too. ser# helps, its a hino j08e...
  11. M

    Kobelco hydraulic excavators

    hi Oliver, please e-mail me direct @ hf_hydraulics@hotmail.com i'll see what i can muster up and send you. sorry for delayed response. adam
  12. M

    Kobelco hydraulic excavators

    hi gregor, first thing, i agree do NOT attempt to adjust any of the hyd pump adjustment screws. i have a few questions... 1) when accessing the serviceman's maint screens in cab display (dash), are you able to read an engine rpm "comp value" and when the engine is running does it read the rpm...
  13. M

    Kobelco hydraulic excavators

    hi, oem seals are good even better than aftermarket, but we do send off our hyd cyls to get overhauled at a reputable hyd cyl shop. he uses aftermarket seals, and we have had no come backs. by the way, in regards to B10 pilot sensor, if it is indeed providing an input signal to the c-1 cpu then...
  14. M

    Kobelco hydraulic excavators

    hi, usually with the mark ii, mark iii, and mark iv models you will see on the hyd schematic that the main hyd control valve will have 4 main reliefs 2 - travel reliefs " TR1 & TR2 " 2 - attachment reliefs " MR1 & MR2 " the travel reliefs are usually set to limit the system pressure in the...
  15. M

    Kobelco hydraulic excavators

    hi, i do believe is an isuzu eng isuzu has 2 inline fuel screens hidden inside 2 of the fuel banjo bolts 1 at the inlet of fuel transfer lift pump 1 at the inlet of fuel water/sep filter pinch off fuel line hose, remove bolt, remove screen, wash, reinstall just in case you are unaware cheers adam
  16. M

    Kobelco hydraulic excavators

    hi, B10 - is that key on engine off ? or key on, engine on, pilot safety lever lock engaged or disengaged ? you might have a bad pilot sensor depending on your answers above or sticking spool in pedal cheers adam
  17. M

    Kobelco hydraulic excavators

    hi, my thoughts at first glance... the screens youre viewing are the psv sol on the hyd pump regulators as you pointed out that once the machine gets hot the hyd pumps are being cut back in hyd oil flow to attempt to keep the load off the engine to try to keep up the eng rpm and with that...
  18. M

    Kobelco hydraulic excavators

    hi, be sure that the shaft has the same # of teeth on splines and size ok. not all the same, have seen fitted but shaft slips. if you fit the new style pilot pump that has the built-in relief use that one. set the old one higher approx 150 psi and plumb up the new pilot pumps tank line to tank adam
  19. M

    Kobelco hydraulic excavators

    hi gregor, if this is your fix, please do post your feedback just the same adam
  20. M

    Kobelco hydraulic excavators

    hi, question, what is your swing gear reduction gear oil level at ? can you see level on the dipstick ? gear oil is 80w-90 if oil is low very likely that the top upper gear carrier has the one gear burned out and unit is mechanically jammed. if no oil i suggest you unbolt the swing hyd mtr and...
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